Dimension Anchor is a monsters-only spell that attempts to temporarily afflict you with the -Tele status effect, preventing you from blinking or teleporting. This spell's effect can also occur as a result of a high level Translocation miscast.
Attempting to blink or teleport results in the following message:
You cannot teleport because you are locked down by Dimension Anchor.
The following enemies cast Dimension Anchor:
This spell was added in 0.13.